A few GDI functions are affected by System account's display
language (by GetSystemPreferredUILanguages).

At this point, this is just the .eh_frame information used for walking the stack.

It was set, but never read.

From outside of macho_module.c, it's only called with NULL.  When it's
called with a non-NULL parameter, it's just a thin wrapper around
macho_load_debug_info_from_map(), so the code can just call that
directly.